Just as Monster Futaba reached the bottom of the stairs, she hissed once again at Sojiro, "Happy Hallowe-"
With an irritated look, Sojiro grabbed the mask and literally ripped it off Futaba's face before she could even finish her sentence. He yanked it off with enough force to detach it from the wrinkly green monster bodysuit that the mask came with. Futaba's orange hair flowed down her normal human face as she blinked and put her glasses back on her face. Realizing that her cover had been blown, she whined, "Awwwww... How did you know, Sojiro?! What gave it away?!"
Sojiro's response was to hold up a crumpled up bill that the monster costume came with. He uncrumpled it, pointed at it, and explained with narrowed eyes, "See this purchase right here? That's what made me suspicious. I found it in the trash."
Futaba groaned while kicking the floor, "Ugh. I knew I should have shredded the receipt..."
As he patted her head, Sojiro chuckled, "Or maybe just don't leave one lying around where I can find it. It was a good try though, Futaba. Better luck next year."
Grumbling, Futaba wandered back up to her room and took off the monster suit, leaving her naked as a jaybird as she approached her closet. Under her breath, she muttered, "Well, Plan A flopped really badly."
She pulled out a glowing wooden mask and grinned wickedly as she looked at it, "Hopefully, Plan B will be much, much better. I wonder how much trouble I can get into with a green face like this?"
Futaba laughed maniacally as if she were a diabolical villain as she proceeded to put the mask on. One could only dread to imagine what she would do or what kinds of horror would ensue. Before exiting her room, she snickered, "Hopefully, this mask won't be removed so easily."